DONE DEAL: Chelsea announce agreement for Diego Costa signing

CONFIRMED: Diego Costa has joined Chelsea from Atletico Madrid [GETTY]

The Blues announced the news on their official website, revealing they had met the buy-out clause for the Brazilian-born Spanish international.

A club statement read: "Chelsea Football Club can confirm an agreement has been reached with Atletico Madrid for the transfer of Diego Costa, with Chelsea meeting the buy-out clause for the Spanish international."

Costa netted 35 goals in 46 games for Diego Simeone's men last season, as they beat off competition from financial heavyweights Barcelona and Real Madrid to claim the Spanish title.

They also battled past Chelsea in the semi-finals of the Champions League, before losing out to neighbours Real in the final.